JP2887752B2 - Paper feeder in paper threader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeder for passing paper along a paper passing path of a rotary press, and more particularly, to a paper feeder provided to be able to move to the outside substantially along the paper passing path. The present invention relates to a paper feeding device that feeds a continuous paper to a towed person when a leading end of the continuous paper is pulled by a threading member to pass through the paper.

[0002]

2. Description of the Related Art The above-mentioned paper feeder is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 6-134957 and Japanese Patent Application Laid-open No. Hei 8-216363.
And Japanese Patent Application Publication No. 2532047 are publicly known.

[0003] Among them, a paper feeder disclosed in Japanese Patent Application Laid-Open No. Hei 6-134957 has a paper feed roller facing a paper passing path, and a continuous paper is sandwiched between the paper feed roller and a guide roller. It is provided so as to be fed to the downstream side, and the continuation caused by the difference between the actual paper passage path of the continuous paper and the passage path of the paper passage member which is set slightly longer than the paper passage path on the downstream side of the paper feed roller. The configuration is such that a moving roller is provided to remove the slack of the paper and to keep the tension of the continuous paper constant.

A paper feeder disclosed in Japanese Patent Application Laid-Open No. Hei 8-216363 has a paper feed roller facing a paper threading path, and a paper feed roller and a guide roller sandwich a continuous paper downstream. To be sent out to the side,
The difference between the actual paper threading path of the continuous paper and the path of the paper threading member that is set slightly longer than the paper threading path is bent toward the downstream side of the paper feed roller, and the amount of bending is detected. Means are provided, and the driving rotation speed of the paper feed roller is adjusted based on the detection result of the amount of deflection, so that the feed amount of the continuous paper during the paper passing is optimized.

Further, in the paper feeder disclosed in Japanese Utility Model Registration No. 2532047, a paper feed roller is provided so as to face a paper passing path, and continuous paper is pressed against a pressing roller by the paper feed roller. Further, a driving means is provided so as to be separable, and further, in order to selectively perform separation of the pressing of the continuous paper against the pressing roller by the feed roller according to the degree of loosening of the continuous paper downstream of the pressing roller. And control means for controlling the operation of the driving means. Then, when there is no slack in the continuous paper downstream of the feed roller, the continuous roller is pressed against the pressing roller by the feed roller to send the continuous paper to the downstream side. Is separated from the press roller to stop feeding the continuous paper.

[0006]

The above publications have the following problems to be solved.

That is, in Japanese Patent Application Laid-Open No. 6-134957, the feeding of continuous paper to the downstream side by the paper feed roller is not controlled. The slack of the continuous paper caused by the difference between the length of the threading path and the path of the slightly longer sheet threading member only increases, and the slack cannot be removed unless a large number of moving rollers are provided. The space becomes large and the manufacturing cost increases. In addition, the provision of a large number of moving rollers complicates the structure, complicates maintenance, and inevitably leads to a high possibility of failure.

[0008] Japanese Unexamined Patent Application Publication No. 8-216363 has been proposed to solve the problems of the invention described in Japanese Unexamined Patent Application Publication No. 6-134957. However, it is necessary to provide control means for electrically controlling the drive rotation speed of the feed roller in accordance with the amount of slack in the continuous paper caused by the difference between the length of the paper threading path and the slightly longer paper threading path, Manufacturing costs were high.

Further, when the change in the feeding speed of the continuous paper fed by the feed roller is not controlled to be smooth, intermittent and sudden tension acts on the continuous paper upstream of the feed roller. When the paper feed is stopped, the take-up body rotates excessively due to inertia, the continuous paper is pulled out more than necessary from the take-up body and hangs down, it is caught by some member, or the continuous paper is broken by sudden pulling There was a risk of being lost.

Further, as disclosed in Japanese Utility Model Registration No. 2532047, the length of a paper threading path and a slightly longer paper threading path are similar to those disclosed in Japanese Patent Application Laid-Open No. 8-216363. The feeding of the continuous paper by the feed roller is controlled in accordance with the amount of slack of the continuous paper caused by the difference between the two, and it is necessary to provide a control means for electrically controlling the feeding of the continuous paper. Had become something.

Also, this utility model registration No. 2532047
In the technique disclosed in Japanese Patent Application Laid-Open Publication No. H11-157, the feed control of the continuous paper by the feed roller is achieved by intermittently pressing the continuous paper against the press roller by the feed roller, so that the contact between the press roller and the feed roller is achieved. In addition to mechanically relatively undesired mechanisms such as separation causing vibration, the continuous paper feed control by contact and separation between the press roller and feed roller repeats feeding and stopping, so the feed roller Intermittent and sudden tension acts on the continuous paper on the more upstream side, and when the paper feed is stopped, the take-up body rotates excessively due to inertia and the continuous paper is pulled out from the take-up body more than necessary. Sagging,
There is a possibility that the continuous paper may be caught by some member or the continuous paper may be broken by a sudden pull.

The present invention has been made in view of the above, and controls the feeding of continuous paper during paper threading to be performed autonomously with a relatively simple configuration without using electric control means. This makes it possible to smoothly change the feeding speed of the continuous paper by the feeding device, so that intermittent and sudden tension does not act on the continuous paper upstream of the feeding device. And then
An object of the present invention is to provide a paper feeding device in a paper threading device capable of performing a stable and efficient paper threading operation.

Further, the present invention has a low manufacturing cost,
Further, it is an object of the present invention to provide a paper feeding device in a paper threading device which is easy to maintain and has a low possibility of occurrence of a failure.

[0014]

In order to achieve the above object, a paper feeding device in a paper threading device according to the present invention comprises:
Outside the paper threading path, a paper threading member movably provided substantially along the paper threading path was provided so as to pull the start end of the continuous paper and pass the continuous paper through the paper threading path. In a paper threading device of a rotary press, a pair of rollers are arranged so that both of them are parallel to the width direction of the continuous paper in the paper threading path, and in a state in which the mutual peripheral surfaces are close to each other, further in the paper threading path direction. One side of the continuous paper on which the peripheral surface of one roller is threaded and the other surface of the continuous paper on which the peripheral surface of the other roller is threaded are arranged so that the positions are shifted to the upstream side and the downstream side. The upstream roller and the downstream roller provided so as to be able to contact each other, and the upstream roller and the downstream roller are the same as the moving speed of the paper passing member even in the feed direction of the continuous paper contacting each other, and at least the peripheral surface speed of the downstream roller is slow. Will be And a drive mechanism for rotating the provided,
Further, the upstream roller is provided so as to be displaceable in accordance with a change in the tension in the length direction generated in the continuous paper to be threaded, and to always apply a force in a direction against the tension. .

In this paper feeder, an upstream roller and a downstream roller are arranged on both sides of the paper passage, and at least the downstream roller is provided so as to be displaceable to the other surface across the paper passage. The displaceable roller is provided so that it can be displaced after the continuous paper is passed through the paper passage between the upstream roller and the downstream roller.

[0016]

[Operation] The continuous paper passed through the operation of the paper passing mechanism is passed between the upstream roller and the downstream roller, and the continuous paper is brought into contact with both rollers. Then, the continuous paper is fed at least by a downstream roller at a speed not slower than the paper passing speed. At this time, tension is applied to the continuous paper by the upstream roller, and the paper feed of the continuous paper by the paper feeder is autonomously controlled. Thereby, large slack does not occur in the continuous paper downstream of the paper feeding device,
In addition, the slack that occurs slightly gradually decreases and disappears.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION
This will be described with reference to the drawings. 1 is a partially omitted perspective view schematically showing an embodiment of the present invention, FIG. 2 is a parallel sectional view of the embodiment shown in FIG. 1, and FIG. 3 is a sectional view taken along line AA in FIG. It is.

The paper feeder 100 according to the present invention includes an upstream roller 1 and a downstream roller 2 which are arranged at positions shifted upstream and downstream in the paper passing direction of the continuous paper W; 2 is provided. The upstream roller 1 in the illustrated embodiment is rotatably supported via bearings 12 and 12 at the distal ends of a pair of arms 11a and 11b attached to the angular displacement shaft 4 described later so as to be angularly displaceable. Have been.

The pair of arms 11a, 11b
One arm 11a of FIG. 3 is provided by a torsion spring 13a provided between the one arm 11a and a bracket 31 of the drive mechanism 3 described later so as to be substantially the same center as the angular displacement axis 4 in FIG. A counterclockwise force is applied.

The other arm 11b is formed by a torsion spring 13b provided between the arm 11b and a spring receiving member 14 attached to the frame F so as to be substantially at the same center as the angular displacement shaft 4. At 3, a counterclockwise force is applied.

The range of angular displacement of both arms 11a, 11b is determined by an appropriate stopper mechanism, for example, arms 11a, 1b.
1b, and a stopper mechanism comprising pins 51a, 52b provided in the bracket 31 and the spring receiving member 14, respectively, and having one end in one of the grooves 51a, 51b. Limited by Also two torsion springs 13
a and 13b are attached so that substantially the same repulsive force is obtained.

The downstream roller 2 in the illustrated embodiment
Are rotatably supported via bearings 22, 22 at respective ends of arms 21a, 21b attached to the angular displacement shaft 4 so as to be capable of angular displacement integrally with the angular displacement shaft 4. .

The angular displacement shaft 4 is provided on the frames F, F on both sides so as to be angularly displaceable, and the arm 41, the pin 42, the clevis 43 at a position near one of the frames F.
Is connected to a telescopic rod 44a of a fluid pressure cylinder 44 which is an air cylinder, for example. The fluid pressure cylinder 44 is attached to the frame F via a rod 45 so as to be angularly displaceable.

Accordingly, the downstream roller 2 is moved from the position shown by the solid line to the position shown by the chain line in FIG. 3 through the angular displacement shaft 4 and the arms 21a and 21b by the expansion and contraction operation of the expansion and contraction rod 44a of the fluid pressure cylinder 44. That is, it is provided so as to be displaced from one side of the paper passage path L to the other side of the paper passage path L across the paper passage path L.

The drive mechanism 3 includes, for example, a drive means 32 which is a variable-speed motor, a drive gear 33 attached to an output shaft of the drive means 32, and a shaft of the upstream roller 1, which are mounted on the frame F via a bracket 31. It comprises a driven gear 34 attached to the end, a driven gear 35 attached to the shaft end of the downstream roller 2, and intermediate gears 36, 37 provided between the driving gear 33 and the driven gears 34, 35.

In the illustrated embodiment, one of the intermediate gears 3
Numeral 6 is rotatably attached to the angular displacement shaft 4 and has two external tooth portions 36a and 36b. The one external tooth portion 36a is meshed with a driven gear 34 attached to the shaft end of the upstream roller 1, and the other external tooth portion 36b is attached to the shaft end of the downstream roller 2 via the intermediate gear 37. The driven gear 35 is engaged with the driven gear 35. The other intermediate gear 37 is rotatably provided on a shaft 38 provided on the arm 21 a supporting one end of the downstream roller 2.

A paper passing mechanism (not shown) for guiding the paper passing member WL is provided substantially outside the paper passing path L, that is, at a position near one frame F.

Next, the operation of this embodiment will be described. First, in a state where the telescopic rod 44a of the fluid pressure cylinder 44 of the paper feeding device 100 is retracted, a paper passing mechanism (not shown) is operated.

By the operation of the paper passing mechanism, the paper passing member WL
Pulls the starting end of the continuous paper W and passes the continuous paper W substantially along the paper passing path L. After the threaded continuous paper W reaches the position of the paper feeding device 100, further passes between the angular displacement shaft 4 and the upstream roller 1, and passes through a position facing the downstream roller 2, a paper feed start detection (not shown) is performed. The paper feed start signal is output by the means.

When the paper feed start signal is output, the drive mechanism 3 starts operating. That is, the driving means 32 is activated, and the driving gear 33, the intermediate gears 36 and 37, the driven gear 3
Via the rollers 4 and 35, the upstream roller 1 and the downstream roller 2 are formed at the same time, and at least the downstream roller 2 has the same peripheral surface speed as the moving speed of the paper threading member WL at the latest, and the respective rollers are in opposite directions. It is driven and rotated.

Subsequently, the telescopic rod 44a of the fluid pressure cylinder 44 is slowly extended, and the angular displacement shaft 4 is slowly angularly displaced clockwise in FIG. 3 via the arm 41 connected to the telescopic rod 44a. You.

When the angular displacement shaft 4 is angularly displaced, the downstream roller 2 is moved from the position shown by the solid line in FIG. 3 through a pair of arms 21a and 21b which are angularly displaced integrally with the angular displacement shaft 4.
It is displaced to the position shown by the dashed line. That is, the downstream roller 2
Comes into contact with one side (upper surface) of the continuous paper W passed through the paper L substantially along the paper passing path L and further expands and contracts the fluid pressure cylinder 44 while increasing the contact area with the one side of the continuous paper W. The movement continues until the rod 44a reaches the stroke end, and the outer peripheral surface of the rod 44a comes to a position close to the outer peripheral surface of the upstream roller 1 and stops. In the meantime, the other surface (lower surface) of the continuous paper W is brought into contact with the outer peripheral surface of the upstream roller 1 to gradually increase the contact area, and finally, as shown by a chain line in FIG. Around the outer peripheral surface of the upstream roller 1 and the downstream roller 2.

When the upstream roller 1 and the downstream roller 2 come in contact with the continuous paper W, the upstream paper 1 and the downstream roller 2 send the continuous paper W to the downstream side by the frictional force between the respective outer peripheral surfaces and the continuous paper W.

Under such a condition, if slack occurs due to a difference in length between the passage path of the paper threading member WL and the actual paper passage path L on the downstream side of the downstream roller 2 of the continuous paper W, the downstream roller The frictional force between the downstream paper 2 and the continuous paper W is reduced, the slip between the downstream roller 2 and the continuous paper W is increased, and the paper feeding operation of the paper feeding apparatus 100 is autonomously suppressed.

Therefore, no large slack is generated on the downstream side of the downstream roller 2 of the continuous paper W, and the slightly generated slack gradually decreases and disappears.

During this time, both the upstream roller 1 and the downstream roller 2 continue to rotate at a constant peripheral surface speed.
The paper feed by the upstream roller 1 and the downstream roller 2 is continuously performed while the speed is gradually reduced and increased.

When the paper feed speed changes from a gradual decrease to a gradual increase, the tension in the longitudinal direction of the continuous paper W changes, but the shock caused by this is caused by the upstream roller 1 being driven by the torsion spring via the arms 11a and 11b. By being displaced in the clockwise direction against the counterclockwise force on the upstream roller 1 by 13a, 13b, the roller can be softened.

When the paper threading member WL reaches a predetermined position near the end point of the paper threading path L, a paper feed end signal is output by a paper feed end detecting means (not shown). When the paper feed end signal is output, the fluid pressure cylinder 44
, The downstream roller 2 moves from the position shown by the dashed line in FIG. 3 to the position shown by the solid line, and both the upstream roller 1 and the downstream roller 2 separate from the continuous paper W. At the same time, the continuous paper W returns to the predetermined paper passing path L. Next, the operation of the drive mechanism 3 stops.

The paper feeder 100 described above with reference to the drawings is provided, for example, between a paper feed unit (not shown) and a printing unit (not shown) of a rotary press. Also,
When the paper threading path L is long as in a newspaper rotary press,
It may be provided at appropriate plural places in the paper threading path L.

In the illustrated embodiment, the physical properties of the outer peripheral surfaces of the upstream roller 1 and the downstream roller 2 are different. That is, the upstream roller 1 is a roller having an outer peripheral surface having a relatively small friction coefficient made of a smoothly finished metal or the like, and the downstream roller 2 is an roller having an outer peripheral surface having a relatively large friction coefficient made of synthetic rubber or the like. I have.

Due to the difference in physical properties of the outer peripheral surface, the main function of the upstream roller 1 is to secure a contact area between the continuous paper W and the outer peripheral surface of the downstream roller 2, and the downstream roller 2 uses the continuous paper W
The different functions are shared so that the sending out of the image is the main function. Further, since the outer peripheral surface of the upstream roller 1 has an outer peripheral surface having a small friction coefficient, the contact surface with the continuous paper W when the upstream roller 1 is displaced in response to a change in tension in the longitudinal direction of the continuous paper W. Is slippery, and is effective in smoothly relieving shock caused by changes in tension.

Further, in the illustrated embodiment, in consideration of slippage occurring between the downstream roller 2 and the continuous paper W, the peripheral surface speed in the driving rotation of the downstream roller 2 is reduced by the paper passing member W.
L is set to be slightly faster than the moving speed of L, and the diameter of the downstream roller 2 is slightly larger than that of the upstream roller 1 so that the peripheral surface speed of the downstream roller 2 in the drive rotation is increased. The speed is set to be slightly higher than the speed, a moderate tension is always generated in the continuous paper W between the two rollers, the continuous paper W is brought into relatively strong contact with the outer peripheral surface of the downstream roller 2, and the continuous paper W is The delivery is made more stable.

Furthermore, in the illustrated embodiment, since the arms 11a and 11b supporting the upstream roller 1 are not integrally connected, there is a slight difference in tension in the longitudinal direction on both sides of the continuous paper W. In addition, the amount of displacement on both sides of the upstream roller 1 can be made different according to the difference in tension of the continuous paper W. Therefore, the continuous paper W can be threaded while correcting the unevenness of the tension in the longitudinal direction of the continuous paper W, and the breakage or the deviation of the continuous paper W due to the uneven tension can be prevented.

[0044]

The present invention is as described above. By implementing the present invention, it is possible to autonomously control the feeding of continuous paper at the time of threading, and to reduce the feeding speed of the continuous paper on the downstream side. It can be smoothly changed according to the state.

Therefore, intermittent and sudden tension does not act on the continuous paper upstream of the paper feeder,
There is no possibility that the continuous paper is excessively pulled out or broken, and a stable and efficient paper threading operation can be performed.

Further, since the present invention does not require electrical control and is extremely simple in terms of mechanism, it can be provided at a low manufacturing cost and can be provided at low cost, and is hardly broken down and maintenance is easy. It is simple and easy to use, and is effective for labor saving and labor saving, and is also effective for lowering running cost.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view schematically showing an embodiment of the present invention.

FIG. 2 is a side sectional view of the embodiment shown in FIG. 1;

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2;

[Explanation of symbols]

1 ... upstream roller, 2 ... downstream roller, 3 ... drive mechanism,
4 ... angular displacement shaft, 11a, 11b ... arm, 12 ... bearing, 13a, 13b ... torsion spring, 14 ... spring receiving member, 21a, 21b ... arm, 22 ... bearing, 31
... blanket, 32 ... driving means, 33 ... driving gear, 3
4, 35: driven gear, 36, 37: intermediate gear, 36a,
36b: external teeth, 38: shaft, 41: arm, 42: pin, 43: clevis, 44: hydraulic cylinder, 44a
... telescopic rod, 45 ... rod, 51a, 51b ... groove, 5
2a, 52b: pins, 100: paper feeder, F: frame, L: paper passing path, W: continuous paper, WL: paper passing member.

Claims (2)

(57) [Claims] 1. A paper threading member provided outside the paper threading path so as to be movable substantially along the paper threading path, pulls the start end of the continuous paper and passes the continuous paper through the paper threading path. In a paper threading device of a rotary press provided as described above, a pair of rollers, in a state where both are parallel to the width direction of the continuous paper in the paper threading path, and the mutual peripheral surfaces are close to each other, One side of the continuous paper on which the peripheral surface of one roller is threaded, and the continuous paper on which the peripheral surface of the other roller is threaded are arranged at positions upstream and downstream in the direction of the paper threading path. An upstream roller and a downstream roller that are provided so as to be able to sequentially contact the other surface of the paper passing member, and the upstream roller and the downstream roller in the feeding direction of the continuous paper contacting each other, and at least the peripheral surface speed of the downstream roller is at least the paper passing member. The moving speed and And a drive mechanism that rotates the upstream roller so that the upstream roller can be displaced in accordance with a change in the tension in the longitudinal direction that occurs in the continuous paper that is passed through the paper, and that constantly resists the tension. A paper feeding device in a paper passing device, wherein the paper feeding device is provided with a force applied to the paper feeding device. 2. An upstream roller and a downstream roller are respectively disposed on both sides of the paper passing path, and at least a downstream roller is provided so as to be displaceable to the other side across the paper passing path. The paper feeding device in the paper passing device according to claim 1, wherein the paper feeding device is provided so as to be displaced after passing the continuous paper through a paper passing path between the upstream roller and the downstream roller.